 .header{
      height: 100px;
      width: 100%;
      background-color: #1d1d25;
      position: absolute;
      background-color:rgba(29,29,37,0.25);
      filter:progid:DXImageTransform.Microsoft.Gradient(startColorstr=#40000000,endColorstr=#40000000);
      top: 0;
      z-index: 99;
    }
    .header .menu{
      width: 1200px;
      margin:0 auto;
      height: 100px;

    }
    .secendmenu{
      height: 50px;
      background-color: red;
      line-height: 50px;
      width: 100%;
      display: none;
      position: absolute;
      z-index: 111;
    }
    .jiejuemenu>ul{
      width: 712px;
      margin: 0 auto;
    }
    .jiejuemenu>ul>li{
      float: left;
      color: #fff;
      width: calc(100% / 4);
      text-align: center;
    }
   
    .menu>ul>li.selectnav{
      background-color: red;
    }
    .jiejuemenu>ul>li a{
      color:#fff;
    }
    .jiejuemenu>ul>li>span{
      float: right;
     }
    .logo{
      width: 120px;
      float: left;
      height: 100px;
      line-height: 27px;
    }
    .logo img{vertical-align: middle;}
    .menu>ul{
      width: 600px;
      height: 100px;
      float: right;
    }
    .menu>ul>li{
      float: left;
      width: calc(100% / 6);
      line-height: 100px;
      color:#fff;
      text-align: center;
    }
    .menu>ul>li>a{
      color: #fff;
      font-size: 18px;
    }
     .menu>ul>li>.secbg>ul>li>a{
       color: #fff;
       font-size: 14px;
     }
    .menu>ul>li:hover{
      background-color: red;
    }
    .menu>ul>li>.secbg>ul{
      height: 50px;
      line-height: 50px;
      width: 850px;
      margin: 0 auto;
      z-index: 111;
    }
    .menu>ul>li:hover>.secbg{
      display: block;
    }
     .menu>ul>li>.secbg>ul>li{
       float: left;
       width: calc(100% / 4);
       height: 50px;

     }
     .menu>ul>li>.secbg>ul>li>span {
        float: right;
        color: #fff;
     }
     .secbg{
      height: 50px;
      line-height: 50px;
      width: 100%;
      position: absolute;
      z-index: 111;
      left: 0px;
      background-color: red;
      margin-top: -2px;
      display: none;
     }